The beat the song is built on is one bar, played through bars 23-25, 27-29 and 31-33, and 1 more place -- 19.7% of every bar the kit plays. This one moves around more than most: the beat is where to start, not the whole job.
It is played on crash, hi-hat, snare and kick, counted in thirty-second notes. On its own it scores 33 out of 100 -- a fair first song -- and the thing that decides that is the independence between the hands and the feet.
The whole song is 69 out of 100, so the beat is not the hard part: what costs you is everything around it, the joins and the fills.
There is not much to reduce here -- the room opens it near enough as written, at 40 BPM, and asks for it clean before it moves.
Two tempos only, 40 and 30 BPM, and the gate at each is 8 loops in a row with no wrong note and no wobble in the time.
PRACTISE THIS BEAT →A one-bar groove on crash, hi-hat, snare and kick, in 4/4 at 30 BPM, counted in thirty-second notes. It is written out above, and it covers 19.7% of the bars the kit plays.
Bars 23-25, 27-29, 31-33 and 35-37. The time is kept on the silence to start with, and it changes 8 times over the song.
33 out of 100 on its own -- a fair first song. The song as a whole is 69 out of 100: demanding, mostly on the independence between the hands and the feet.